CATALOGUE. 275 margined, 3-4" wide (radical, and toward lower part of the stem); invo¬ lucre 3-leaved, leaves much exceeding the umbel; 3-4 rays of the umbel erect, many 8-14-flowered spikelets agglomerated into an oblong head; scales ovate, obtuse, 7-9-nerved, sides brown and midrib green; the bracts subtending the spikelets setaceous, nearly as long as the spikelet; achenia triangular-ovate, somewhat shorter than the scales; stigmas 3; stamens 3.—Sanoita VaUey, Arizona (600, 601). Cypeeus eotundatus, L., var. Hydea, Gray.—Nevada. Cypeeus phymatodes, Muhl. (G. repens, Ell; Bot. Mex. Bound.).— Southern Arizona (365, 400 a). Hemicaepha subsquaeeosa, Nees.—^A luxuriant specimen from Camp Lowell, Southern Arizona (715). It appears to me as though this genus rests on insufficient foundation, the inner scale being so often reduced to a minimum, and at times is wanting altogether. Eleochaeis palusteis, R. Br.—Camp Grant, Arizona, furnishes a specimen (380) with the bristles shorter than the achenium; San Luis Valley, Colorado (927, 977). Eleochaeis aciculaeis, R. Br.—Alkaline flats of San Luis Valley, Colorado (928). Bristles twice as long as the achenium. SciEPUS paucifloeus, Lightfoot.—Twin Lakes, Colorado (926). Sctepus pungens, Vahl.—Denver (925), and Gila Valley, Arizona, at 3,080 feet elevation (336). Nevada. SciEPUS validus, Vahl—San Luis Valley (930); Western New Mexico, at 6,500 feet elevation (104, Loew); also Arizona (330 a), with bristles to fruit longer than achenium; and Nevada. SciEPUS maeitimus, L.—Nevada. Eeiophoeum polystachyon, L.—Twin Lakes (968). FiMBEiSTYLis CAPILLAEIS, Gray.—Southern Arizona (611, 624). Quite variable in size and in shape of fruit. Cladium effusum, Torr.—Culms nearly terete, 3-7° high; elongated, linear leaves acutely serrate on back and margin; spikes small, several in a cluster, forming large, loose panicles; scales 4-7, the lowest empty, the top one with a perfect flower, and the one below it with a staminate flower.—Nevada.